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# Copyright (C) 2010 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import sha
import re
import common
def FindRadio(zipfile):
matches = []
for name in zipfile.namelist():
if re.match(r"^RADIO/radio[.](.+[.])?img$", name):
matches.append(name)
if len(matches) > 1:
raise ValueError("multiple radio images in target-files zip!")
if matches:
print "using %s as radio.img" % (matches[0],)
return zipfile.read(matches[0])
else:
return None
def FullOTA_InstallEnd(info):
try:
bootloader_img = info.input_zip.read("RADIO/bootloader.img")
except KeyError:
print "no bootloader.img in target_files; skipping install"
else:
common.ZipWriteStr(info.output_zip, "bootloader.img", bootloader_img)
info.script.Print("Writing bootloader...")
info.script.WriteRawImage("/bootloader", "bootloader.img")
radio_img = FindRadio(info.input_zip)
if not radio_img:
print "no radio.img in target_files; skipping install"
else:
common.ZipWriteStr(info.output_zip, "radio.img", radio_img)
info.script.Print("Writing radio...")
info.script.WriteRawImage("/radio", "radio.img")
def IncrementalOTA_VerifyEnd(info):
target_radio_img = FindRadio(info.target_zip)
source_radio_img = FindRadio(info.source_zip)
if not target_radio_img or not source_radio_img: return
if source_radio_img != target_radio_img:
info.script.CacheFreeSpaceCheck(len(source_radio_img))
radio_type, radio_device = common.GetTypeAndDevice("/radio", info.info_dict)
info.script.PatchCheck("%s:%s:%d:%s:%d:%s" % (
radio_type, radio_device,
len(source_radio_img), sha.sha(source_radio_img).hexdigest(),
len(target_radio_img), sha.sha(target_radio_img).hexdigest()))
def IncrementalOTA_InstallEnd(info):
try:
target_bootloader_img = info.target_zip.read("RADIO/bootloader.img")
try:
source_bootloader_img = info.source_zip.read("RADIO/bootloader.img")
except KeyError:
source_bootloader_img = None
if source_bootloader_img == target_bootloader_img:
print "bootloader unchanged; skipping"
else:
common.ZipWriteStr(info.output_zip, "bootloader.img", target_bootloader_img)
info.script.Print("Writing bootloader...")
info.script.WriteRawImage("/bootloader", "bootloader.img")
except KeyError:
print "no bootloader.img in target target_files; skipping install"
tf = FindRadio(info.target_zip)
if not tf:
# failed to read TARGET radio image: don't include any radio in update.
print "no radio.img in target target_files; skipping install"
else:
tf = common.File("radio.img", tf)
sf = FindRadio(info.source_zip)
if not sf:
# failed to read SOURCE radio image: include the whole target
# radio image.
tf.AddToZip(info.output_zip)
info.script.Print("Writing radio...")
info.script.WriteRawImage("/radio", tf.name)
else:
sf = common.File("radio.img", sf)
if tf.sha1 == sf.sha1:
print "radio image unchanged; skipping"
else:
diff = common.Difference(tf, sf)
common.ComputeDifferences([diff])
_, _, d = diff.GetPatch()
if d is None or len(d) > tf.size * common.OPTIONS.patch_threshold:
# computing difference failed, or difference is nearly as
# big as the target: simply send the target.
tf.AddToZip(info.output_zip)
info.script.Print("Writing radio...")
info.script.WriteRawImage("radio", tf.name)
else:
common.ZipWriteStr(info.output_zip, "radio.img.p", d)
info.script.Print("Patching radio...")
radio_type, radio_device = common.GetTypeAndDevice(
"/radio", info.info_dict)
info.script.ApplyPatch(
"%s:%s:%d:%s:%d:%s" % (radio_type, radio_device,
sf.size, sf.sha1, tf.size, tf.sha1),
"-", tf.size, tf.sha1, sf.sha1, "radio.img.p")
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